(19)

(11)

EP 2 055 021 A2

(12)

(43) Date of publication: 06.05.2009 Bulletin 2009/19 (21) Application number: 07843092.3 (22) Date of filing: 25.09.2007

(51) International Patent Classification (IPC):  H04B 7/216(2006.01) (86) International application number: PCT/US2007/079354 (87) International publication number: WO 2008/042641 (10.04.2008 Gazette 2008/15)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 04.10.2006 US 542739 (71) Applicant: Cisco Technology, Inc. San Jose, CA 95134-1706 (US)	(72) Inventors: HART, Brian, Donald Sunnyvale, CA 94087 (US) DOUGLAS, Bretton, Lee San Jose, CA 95134 (US) (74) Representative: Kazi, Ilya et al Mathys & Squire LLP 120 Holborn London EC1N 2SQ London EC1N 2SQ (GB)